I Built My Own UPS! (DIY 18650 Battery Box Power Review) #DIY #UPS #18650 #PowerBank #DIYEelectronics #TechReview 👉 Get It Now: Want a cheap, customizable, and repairable backup power supply for your router, modem, or smart home gadgets? I built and tested this DIY DC UPS Power Bank Box that holds SIX 18650 batteries to see if it's a hacker's dream or a safety hazard. This barebones kit requires you to supply your own 18650 cells. In this hands-on review, I'll cover: 🔧 THE BUILD PROCESS: How easy is it to assemble? 🔋 BATTERY BASICS: What 18650 cells should you use (and avoid)? ⚡ PERFORMANCE TEST: How long can it power a router and modem? 🛡️ SAFETY CHECK: Does it have proper protection circuits? 💡 USE CASES: Can it be a giant power bank for phones and tablets? I'll assemble it with high-quality batteries, test its runtime and voltage stability, and show you exactly what you can (and can't) power with it. Is this the ultimate budget, DIY uninterruptible power supply? Disclaimer: This is NOT a sponsored video. All opinions expressed are my own. ___ Affiliate Disclaimer: While we receive affiliate compensation for reviews/promotions on this page, we always offer honest opinions, relevant experiences, and genuine views related to the product or service itself. ◀EARNINGS DISCLAIMER ▶ When I link to products and services, those links may be affiliate links. If you click on any of those affiliate links and make a purchase within a specific time frame. I’ll earn a small commission. The commission is paid by the retailers, at no cost to you. Thanks for watching ❤️Have A Nice Day, Metul Roy